Effects of Foliage Application of Calcium on Fruit Firmness Quality Indexes in Korla Fragrant Pear

【Objective】The study aims to clarify the effects of calcium application on fruit quality of Korla fragrant pear.【Method】Calcium solution of different kinds was sprayed on the foliage of Korla fragrant pear during the fruit development in definite interval to analyze the quality related indexes of ripened fruit.【Result】Compared with the CK,the foliar-spraying of COMPO liquid calcium on Korla fragrant pear in the young stage,the effect of weight per fruit was better than other treatments,which increased fruit weight by 12.04%.At different times,four kinds of calcium solution were sprayed on Korla fragrant pear.Fruit shape index of each calcium treatment was reduced,but the effect of COMPO liquid calcium treatment was the best,which reduced the index by 6.09%.At young stage,four kinds of calcium solution were sprayed on Korla fragrant pear,and the fruit firmness of each treatment was increased.Only CAL-MAX treatment had significant difference,which increased the firmness by 19.65%.In addition to CAL-MAX,foliar-spraying of calcium amino acid,fruit and vegetable calcium and COMPO liquid calcium on Korla fragrant pear in the stage of enlargement all increased the soluble solid content by 1.01%,1.32% and 2.26%,respectively.【Conclusion】 At young stage,COMPO liquid calcium and CAL-MAX were sprayed on Korla fragrant pear,the effect of increasing fruit weight and firmness were better than other treatments.In the stage of enlargement,COMPO liquid calcium was sprayed on Korla fragrant pear,the effect of improving soluble solid content and reducing fruit shape index were the best.